I have a 2000 Pontiac Grand AM GT.108K miles. The car has been doing this thing every now and then when decelerating from highway speeds, the throttle will not come down. I have to fight the car with the brakes so that it doesn't lunge forward and hit the guy ahead of me. The only way to stop it is to put the car in park. When that happens, the RPM'S shoot up to 3000, 4000, etc. Before I pull the key out. When I go to start up again, the RPMS will immediately rev up to 3000 RPM, and then after 5 seconds or so settle in the normal idle range. My mechanic friend thinks it's the TPS, but no " check engine" light has come on. I've had it to two mechanics that have told me nothing is wrong with it. Help!
Tuesday, March 13th, 2007 AT 11:26 AM